1 // SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
2 /* Copyright (c) 2017-2019 Mellanox Technologies. All rights reserved */
3
4 #define pr_fmt(fmt) "MFA2: " fmt
5
6 #include "mlxfw_mfa2_tlv_multi.h"
7 #include <uapi/linux/netlink.h>
8
9 #define MLXFW_MFA2_TLV_TOTAL_SIZE(tlv) \
10 NLA_ALIGN(sizeof(*(tlv)) + be16_to_cpu((tlv)->len))
11
12 const struct mlxfw_mfa2_tlv *
mlxfw_mfa2_tlv_multi_child(const struct mlxfw_mfa2_file * mfa2_file,const struct mlxfw_mfa2_tlv_multi * multi)13 mlxfw_mfa2_tlv_multi_child(const struct mlxfw_mfa2_file *mfa2_file,
14 const struct mlxfw_mfa2_tlv_multi *multi)
15 {
16 size_t multi_len;
17
18 multi_len = NLA_ALIGN(sizeof(struct mlxfw_mfa2_tlv_multi));
19 return mlxfw_mfa2_tlv_get(mfa2_file, (void *) multi + multi_len);
20 }
21
22 const struct mlxfw_mfa2_tlv *
mlxfw_mfa2_tlv_next(const struct mlxfw_mfa2_file * mfa2_file,const struct mlxfw_mfa2_tlv * tlv)23 mlxfw_mfa2_tlv_next(const struct mlxfw_mfa2_file *mfa2_file,
24 const struct mlxfw_mfa2_tlv *tlv)
25 {
26 const struct mlxfw_mfa2_tlv_multi *multi;
27 u16 tlv_len;
28 void *next;
29
30 tlv_len = MLXFW_MFA2_TLV_TOTAL_SIZE(tlv);
31
32 if (tlv->type == MLXFW_MFA2_TLV_MULTI_PART) {
33 multi = mlxfw_mfa2_tlv_multi_get(mfa2_file, tlv);
34 if (!multi)
35 return NULL;
36 tlv_len = NLA_ALIGN(tlv_len + be16_to_cpu(multi->total_len));
37 }
38
39 next = (void *) tlv + tlv_len;
40 return mlxfw_mfa2_tlv_get(mfa2_file, next);
41 }
42
43 const struct mlxfw_mfa2_tlv *
mlxfw_mfa2_tlv_advance(const struct mlxfw_mfa2_file * mfa2_file,const struct mlxfw_mfa2_tlv * from_tlv,u16 count)44 mlxfw_mfa2_tlv_advance(const struct mlxfw_mfa2_file *mfa2_file,
45 const struct mlxfw_mfa2_tlv *from_tlv, u16 count)
46 {
47 const struct mlxfw_mfa2_tlv *tlv;
48 u16 idx;
49
50 mlxfw_mfa2_tlv_foreach(mfa2_file, tlv, idx, from_tlv, count)
51 if (!tlv)
52 return NULL;
53 return tlv;
54 }
55
56 const struct mlxfw_mfa2_tlv *
mlxfw_mfa2_tlv_multi_child_find(const struct mlxfw_mfa2_file * mfa2_file,const struct mlxfw_mfa2_tlv_multi * multi,enum mlxfw_mfa2_tlv_type type,u16 index)57 mlxfw_mfa2_tlv_multi_child_find(const struct mlxfw_mfa2_file *mfa2_file,
58 const struct mlxfw_mfa2_tlv_multi *multi,
59 enum mlxfw_mfa2_tlv_type type, u16 index)
60 {
61 const struct mlxfw_mfa2_tlv *tlv;
62 u16 skip = 0;
63 u16 idx;
64
65 mlxfw_mfa2_tlv_multi_foreach(mfa2_file, tlv, idx, multi) {
66 if (!tlv) {
67 pr_err("TLV parsing error\n");
68 return NULL;
69 }
70 if (tlv->type == type)
71 if (skip++ == index)
72 return tlv;
73 }
74 return NULL;
75 }
76
mlxfw_mfa2_tlv_multi_child_count(const struct mlxfw_mfa2_file * mfa2_file,const struct mlxfw_mfa2_tlv_multi * multi,enum mlxfw_mfa2_tlv_type type,u16 * p_count)77 int mlxfw_mfa2_tlv_multi_child_count(const struct mlxfw_mfa2_file *mfa2_file,
78 const struct mlxfw_mfa2_tlv_multi *multi,
79 enum mlxfw_mfa2_tlv_type type,
80 u16 *p_count)
81 {
82 const struct mlxfw_mfa2_tlv *tlv;
83 u16 count = 0;
84 u16 idx;
85
86 mlxfw_mfa2_tlv_multi_foreach(mfa2_file, tlv, idx, multi) {
87 if (!tlv) {
88 pr_err("TLV parsing error\n");
89 return -EINVAL;
90 }
91
92 if (tlv->type == type)
93 count++;
94 }
95 *p_count = count;
96 return 0;
97 }
98